Hai..friend..you can use any small meter, works in milli amperes, can used to read battery state...means, VU, Range, Battery, meters can be used for same purpose.for that you need only a smaller electronic circuit, wired around a transistor, costs around a dollar.after wiring, you can connect a good battery, at first, along with your multi meter, to understand the exact position, of needle at a particular voltage.keep this point in your mind, or you can mark it on panel,so the next time you can simply read all battery voltages from your battery, from 1.5 to 24 volts.i will post the circuit here on next day. as now i am in office. thank you..